.selection-title {
    color: red;
}

.content {
    height: 820px;
}

.course-selection {
    height: 90%;
    /*border: 1px solid;*/
    display: flex;
    font-size: smaller;
}

.left {
    /*border: 1px solid;*/
    width: 50%;
}

/* 右半边 */
.right {
    /*border: 1px solid blue;*/
    margin-left: 20px;
    width: 50%;
}

/* 可选讲台 */
.platform {
    height: 50%;
}

/* 已选课程 */
.selected {

}

.sub-course {
    display: inline-block;
    width: 100%;
    text-align: center;
    color: red;
    font-size: large;
}

.add-course {
    display: inline-block;
    width: 100%;
    text-align: center;
    color: green;
    font-size: large;
}
